题目内容

精馏塔进料时,若q=1,则表明进料状况为

A. 冷料
B. 饱和液体
C. 饱和蒸汽
D. 气液混合料

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适宜回流比应取最小回流比的

A. 1.1~1.5倍
B. 1.1~2.0倍
C. 1.5~2.0倍
D. 1.5~2.5倍

当回流比增大时,所需塔板数增多

A. 对
B. 错

全回流时理论板数最多

A. 对
B. 错

What is the news report chiefly about?

A. US Navy bans sailors from alcohol use in Japan.
B. US Navy banned all activities of its workforce in Japan.
C. A US sailor on the Japanese island was killed.
D. People in Japan are banned from drinking alcohol.

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